Patents by Inventor Robert A. Pollack

Robert A. Pollack has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polymeric materials to self-regulate the level of polar activators in electrorheological fluids
    Patent number: 6065572
    Abstract: Electrorheological systems of improved temperature range are obtained by including within the system a solid polymer insoluble in a low molecular weight activating material and in the hydrophobic medium of the fluid. The polymer contains hydrophilic functionality, and in the polymer a portion of the low molecular weight polar activating material is sorbed in an amount which reversibly increases with increasing temperature.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: May 23, 2000
    Assignee: The Lubrizol Corporation
    Inventors: Barton J. Schober, Joseph W. Pialet, Robert A. Pollack, Denise R. Clark
  • Polymeric materials to self-regulate the level of polar activators in electrorheological fluids
    Patent number: 5843331
    Abstract: Electrorheological systems of improved temperature range are obtained by including within the system a solid polymer insoluble in a low molecular weight activating material and in the hydrophobic medium of the fluid. The polymer contains hydrophilic functionality, and in the polymer a portion of the low molecular weight polar activating material is sorbed in an amount which reversibly increases with increasing temperature.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: December 1, 1998
    Assignee: The Lubrizol Corporation
    Inventors: Barton J. Schober, Joseph W. Pialet, Robert A. Pollack, Denise R. Clark
  • Polysaccharide coated electrorheological particles
    Patent number: 5445760
    Abstract: An electrorheological fluid having good shear stress and improved (reduced) conductivity comprises a hydrophobic liquid phase and, dispersed therein, electrorheologically active particles of a core particle with a coating of at least one polysaccharide which is dispersible in a protic medium.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: August 29, 1995
    Assignee: The Lubrizol Corporation
    Inventor: Robert A. Pollack
  • Diskette storage container
    Patent number: D307075
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: April 10, 1990
    Assignee: MicroComputer Accessories, Inc.
    Inventor: Robert Pollack